I do see a slight difference between 'selling' a specific content, and providing a service that allows customers to acquire the content from a 3rd party. Like you say if this goes through then any VPN type service (assume jurisdiction restricted to NZ based) had better get a good lawyer.
The silly thing is that there are soooo many ways to get the content, it's kind of like shooting a BB gun into a stampeding heard of bulls and hoping they will all stop.
Yes it is interesting that they see global mode type services as a legal issue - if you import a banned DVD into the country you are breaking the law, but I've never seen NZ Post in court for transporting the goods.
But wouldn't it shift to the actual user who is getting access to the content, rather than the provider? I thought NZ had already been through this with music and movies being downloaded over bittorrent. The thing is that Google already operate in NZ i and they operate youtube, and you tube has movies and other videos with no content classifications. Are they going to block youtube videos that aren't classified? What about online games? I believe they do now play through games to classify them.